RT9728A RICHTEK [Richtek Technology Corporation], RT9728A Datasheet
RT9728A
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RT9728A Summary of contents
Page 1
... P-MOSFET high side power switch IC for USB application with a programmable current limit feature. Low switch-on resistance (typ.120mΩ) and low supply current (typ. 120μA) are realized in this IC.The RT9728A can offer a programmable current limit threshold between 75mA and 1.3A (typ.) via an external resistor. The ±10% current limit accuracy can be realized for all current limit settings ...
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... Pad © Copyright 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 RT9728ALGE RT9728ALGQW RT9728ALZQW VIN VOUT RT9728A 10µF R FAULT 100k ILIM FAULT EN/EN GND Pin Name VIN Input Voltage. Ground. The exposed pad must be soldered to a large PCB and GND connected to GND for maximum power dissipation ...
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... Copyright 2012 Richtek Technology Corporation. All rights reserved. DS9728A-03 July 2012 Reverse Voltage + - Switch well Current Sense Current Drive Limit Thermal UVLO Sense ILIM is a registered trademark of Richtek Technology Corporation. RT9728A Comparator VOUT 4ms Deglitch FAULT GND 7.5ms Deglitch www.richtek.com 3 ...
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... RT9728A Absolute Maximum Ratings Supply Input Voltage ------------------------------------------------------------------------------------------------------ Other Pin Voltage --------------------------------------------------------------------------------------------------------- −0. Power Dissipation 25° SOT-23-6 -------------------------------------------------------------------------------------------------------------------- 0.4W WDFN-6L 2x2 -------------------------------------------------------------------------------------------------------------- 0.606W Package Thermal Resistance (Note 2) SOT-23-6, θ --------------------------------------------------------------------------------------------------------------- 250°C/W JA WDFN-6L 2x2, θ --------------------------------------------------------------------------------------------------------- 165°C/W JA WDFN-6L 2x2, θ -------------------------------------------------------------------------------------------------------- 7°C/W JC Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C Junction Temperature ----------------------------------------------------------------------------------------------------- 150° ...
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... Symbol Test Conditions I = 1mA V FAULT 5.5V FAULT FAULT assertion or de-assertion due to over current condition FAULT assertion or de-assertion due to reverse voltage condition Min Typ -- 135 -- 180 -- registered trademark of Richtek Technology Corporation. RT9728A Max Unit -- μ www.richtek.com 5 ...
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... RT9728A Typical Operating Characteristics Supply Current vs. Temperature 150 140 130 120 110 100 90 80 -50 - Temperature (°C) On- Resistance vs. Temperature 150 140 130 120 V = 3.6V IN 110 100 -50 - Temperature (°C) EN/EN Threshold Voltage vs. Temperature 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 -50 - Temperature (°C) © ...
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... 150μF, IN OUT R = 20kΩ ILIM is a registered trademark of Richtek Technology Corporation. RT9728A Power Off from EN EN OUT I IN RT9728AH 20kΩ, R ILIM Time (500μs/Div) Power Off from EN EN OUT I IN RT9728AL 20kΩ, R ILIM Time (500μ ...
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... RT9728A Current Limit V OUT (2V/Div) Fault (5V/Div (1A/Div) Time (2.5ms/Div) Static Drain-Source Current vs. V 1600 1400 1200 1000 800 600 400 200 0 0 200 400 © Copyright 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 No Load to Short Circuit ...
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... Applications Information The RT9728A is a single P-MOSFET high side power switch with active-high/low enable input, optimized for self- powered and bus-powered Universal Serial Bus (USB) applications. The switch's low R DS(ON) drop requirements and a flag output is available to indicate fault conditions to the local USB controller. ...
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... The maximum guaranteed voltage for a logic-low at the EN/EN pin is 0.66V. A minimum guaranteed voltage of 1.1V at the EN/ EN pin will turn off the RT9728A. Floating the input may cause unpredictable operation. EN/EN should not be allowed to go negative with respect to GND. ...
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... WDFN-6L 2x2 0.45 0.40 0.35 0.30 SOT-23-6 0.25 0.20 0.15 0.10 0.05 0. Ambient Temperature (°C) Figure 2. Derating Curve of Maximum Power Dissipation © Copyright 2012 Richtek Technology Corporation. All rights reserved. DS9728A-03 July 2012 and thermal J(MAX) Single-Layer PCB 75 100 125 is a registered trademark of Richtek Technology Corporation. RT9728A www.richtek.com 11 ...
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... RT9728A Outline Dimension Symbol © Copyright 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com Dimensions In Millimeters Min Max 0.889 1.295 0.000 0.152 1.397 1.803 0.250 0.560 2.591 2.997 2.692 3.099 0.838 1.041 0.080 ...
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... W-Type 6L DFN 2x2 Package RT9728A 2 1 DETAIL A Pin #1 ID and Tie Bar Mark Options Dimensions In Inches Min Max 0.028 0.031 0.000 0.002 0.007 0.010 0.008 0.014 ...